Electronic fault codes active or high counts of inactive fault codes
View and troubleshoot the fault codes with INSITEl’M. Refer to the Troubleshooting and Repair
Manual, CM21 00 and CM2150 Electronic Control System, Bulletin 4021570.
Turbocharger is not correct
Check the turbocharger part number and compare it to the Control Parts List (CPL), Bulletin 3379133 or 4021327. Replace the turbocharger if necessary. Refer to Procedure 01 0-033.
Air intake system restriction is above specification
Check the air intake system for restriction. Clean or replace the air filter and inlet piping as
necessary. Refer to Procedure 010-031.
Air intake or exhaust leaks
Inspect the air intake and exhaust systems for air leaks. Refer to Procedure 010-024 On engines
equipped with EGA, make sure to inspect the EGA Tube Connections for Leaks. Refer to Procedures 010-019 and Procedure 011-025.
Air intake or exhaust piping is contacting the chassis or cab
Inspect the air piping, chassis, and cab for contact points. Refer to the OEM service manual.
Exhaust system restriction is not within specification
Check the exhaust system for restrictions. Refer to Procedure 011-009.
Lubricating oil is thin or diluted
Refer to Procedure 007-048 and 007-083 to check if the lubricating oil is contaminated. If the
lubrication oil is contaminated, see the Lubricating Oil Contaminated symptom tree.
Lubricating oil pressure is below specification
Check the oil pressure. Refer to Procedure Procedure 007-037. If the pressure is low, refer to
the Lubricating Oil Pressure Low symptom tree.
Turbocharger is worn or damaged
Check the turbocharger for damage. Measure the turbine and compressor wheel clearances. Refer
to Procedure 010-033.